New testcase for PR310

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12596 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailDup/2004-04-01-DemoteRegToStack.llx b/test/Transforms/TailDup/2004-04-01-DemoteRegToStack.llx
new file mode 100644 (file)
index 0000000..21a3ffa
--- /dev/null
+++ b/test/Transforms/TailDup/2004-04-01-DemoteRegToStack.llx
@@ -0,0 +1,22 @@
+; RUN: llvm-as < %s | opt -tailduplicate -disable-output
+
+void %interpret() {
+entry:
+       br label %retry
+
+retry:
+       %tmp.8 = call int %interp()
+       switch uint 0, label %endif.4 [
+                uint 4294967271, label %return
+                uint 4294967280, label %return
+       ]
+
+endif.4:
+       br bool false, label %return, label %retry
+
+return:
+       %result.0 = phi int [ %tmp.8, %retry ], [%tmp.8, %retry], [ %tmp.8, %endif.4 ]
+       ret void
+}
+
+declare int %interp()